The MOE, on the other hand, measures stiffness and indicates the ability to resist deflection. In general, the MOE followed the same trend as the MOR. The MOE decreased at the higher PMDI replacements with RBA and the decrease was more significant at the higher replacement percentages and ratios. Again, a replacement of up to 30% PMDI with RBA resulted in particleboard with a MOE that was not statistically different than the control. It appears from the figure and statistical analysis that a 10% PMDI replacement with RBA gave particleboard with a higher MOE than the control (2545 MPa versus 1758 MPa).